ICSE Class 7 Science · Exam Practice

Science Practice Paper — Set 1

Science Practice Paper — Set 1. ICSE Class 7 Science, covering classification, nervous system and excretion, photosynthesis and respiration, atomic structure, metals and non-metals, chemical changes, motion, heat, light and sound, with a full answer key and worked solutions.

🎯 Full Marks: 50⏱️ Time: 1½ Hours📝 Questions: 30
SectionType of questionsQsMarks
AMultiple Choice Questions1010
BFill in the Blanks & True / False88
CShort Answer Questions816
DProblem Solving416
Total3050
Before you start
  • This paper samples across the ICSE Class 7 Science chapters on MuskMeadow: classification, nervous system and excretion, photosynthesis and respiration, atomic structure, metals and non-metals, chemical changes, motion, heat, light and sound.
  • Attempt the paper first, without looking at the answer key at the bottom of the page.
  • Show your working for Sections C and D — method marks are given even if the final answer is wrong.
  • This is a MuskMeadow practice paper. It is not an official CISCE paper and its mark scheme does not copy the board's exact pattern.
10 MARKS

Section A — Multiple Choice Questions

Choose the correct option. (1 mark each)

1. A train travels 60 km in 2 hours. Its average speed is

A. 120 km/hB. 30 km/hC. 62 km/hD. 15 km/h

2. The main nitrogenous waste excreted by humans is

A. glucoseB. ureaC. starchD. oxygen

3. Which sub-atomic particle carries a negative charge?

A. ProtonB. NeutronC. ElectronD. Nucleus

4. Which of the following is a chemical change?

A. Melting of iceB. Dissolving sugarC. Burning of paperD. Boiling of water

5. Which of these is a good conductor of electricity?

A. RubberB. WoodC. CopperD. Plastic

6. Heat is transferred in liquids mainly by

A. conductionB. convectionC. radiationD. evaporation

7. A ray strikes a plane mirror at an angle of incidence of 30°. The angle of reflection is

A. 60°B. 30°C. 90°D. 0°

8. Animals with a backbone are called

A. invertebratesB. vertebratesC. arthropodsD. molluscs

9. The atomic number of an element is the number of

A. neutronsB. protonsC. protons + neutronsD. molecules

10. The SI unit of frequency is

A. metreB. secondC. hertzD. decibel
8 MARKS

Section B — Fill in the Blanks & True / False

Fill in each blank, or write True / False. (1 mark each)

11. Photosynthesis takes place in the ______ of leaf cells.

12. The control centre of the human nervous system is the ______.

13. Rusting of iron is a physical change. (   )

14. The chemical symbol of potassium is ______.

15. Sound travels faster in solids than in air. (   )

16. The SI unit of energy is the ______.

17. Non-metals are generally good conductors of heat. (   )

18. A substance that causes an allergy is called an ______.

16 MARKS

Section C — Short Answer Questions

Show your working. (2 marks each)

19. Magnesium has atomic number 12 (electron arrangement 2, 8, 2). What is its valency?

20. An atom has atomic number 11 and mass number 23. How many electrons and neutrons does it have?

21. Write the word equation for respiration.

22. A car covers 150 km in 3 hours. Find its average speed.

23. Name the three modes of heat transfer.

24. Convert 36 km/h into m/s.

25. Give two differences between metals and non-metals.

26. Name the two parts of the central nervous system.

16 MARKS

Section D — Problem Solving

Show all steps. (4 marks each)

27. A car travels 60 km in the first 1.5 hours and 90 km in the next 1.5 hours. Find (a) the total distance, (b) the total time and (c) the average speed.

28. (a) A sonar signal sent from a ship returns after 2 s. If sound travels at 1500 m/s in water, find the depth of the sea. (b) An echo in air (340 m/s) is heard after 1 s; how far is the reflecting wall? (c) A pendulum makes 20 oscillations in 10 s. Find its frequency and time period.

29. (a) Write the balanced equation for burning magnesium in oxygen. (b) What type of reaction is this? (c) Using Mg = 24 and O = 16, find the mass of magnesium oxide formed from 48 g of magnesium.

30. (a) Name the five classes of vertebrates. (b) Which two are warm-blooded? (c) Give one example of each class.

ICSE Class 7 Science · Science Practice Paper — Set 1 · Answer Key

Answers & Worked Solutions

Check your paper, then read the solutions for the questions you missed.

Section A — Multiple Choice Questions (10 marks)
Q1. B. 30 km/h

Speed = distance/time = 60/2 = 30 km/h.

Q2. B. urea

The kidneys remove urea from the blood and form urine.

Q3. C. Electron

Electrons are negatively charged; protons are positive; neutrons are neutral.

Q4. C. Burning of paper

Burning forms new substances (ash, gases) and cannot be reversed.

Q5. C. Copper

Metals such as copper conduct electricity well.

Q6. B. convection

Warm liquid rises and cool liquid sinks, setting up convection currents.

Q7. B. 30°

Law of reflection: i = r.

Q8. B. vertebrates

Vertebrates have a vertebral column (backbone).

Q9. B. protons

Atomic number = number of protons in the nucleus.

Q10. C. hertz

1 hertz = 1 vibration per second.

Section B — Fill in the Blanks & True / False (8 marks)
Q11. chloroplasts

Chloroplasts contain chlorophyll.

Q12. brain

The brain with the spinal cord forms the central nervous system.

Q13. False

Rusting forms a new substance, iron oxide, so it is a chemical change.

Q14. K

From the Latin name, kalium.

Q15. True

Particles in solids are closer together and pass the vibration on quickly.

Q16. joule

Symbol: J.

Q17. False

Most non-metals are poor conductors (graphite is an exception for electricity).

Q18. allergen

Examples: pollen, dust, some foods.

Section C — Short Answer Questions (16 marks)
Q19. 2
  1. It has 2 electrons in the outer shell.
  2. It loses these 2 electrons to form Mg²⁺, so its valency is 2.
Q20. 11 electrons, 12 neutrons
  1. In a neutral atom, electrons = protons = atomic number = 11.
  2. Neutrons = 23 − 11 = 12.
Q21. glucose + oxygen → carbon dioxide + water + energy
  1. Glucose reacts with oxygen inside cells.
  2. Glucose + oxygen → carbon dioxide + water + energy.
Q22. 50 km/h
  1. Speed = distance/time.
  2. 150/3 = 50 km/h.
Q23. Conduction, convection and radiation
  1. Conduction: through solids, e.g. a heated metal rod.
  2. Convection: in fluids; radiation: through space, e.g. heat from the Sun.
Q24. 10 m/s
  1. 1 km/h = 1000/3600 m/s.
  2. 36 × 1000/3600 = 10 m/s.
Q25. Metals are lustrous, malleable, conduct; non-metals are dull, brittle, insulate
  1. Metals are shiny, malleable, ductile and good conductors.
  2. Non-metals are dull, brittle (solids) and generally poor conductors.
Q26. Brain and spinal cord
  1. The brain is protected by the skull.
  2. The spinal cord runs inside the backbone.
Section D — Problem Solving (16 marks)
Q27. (a) 150 km (b) 3 h (c) 50 km/h
  1. (a) Total distance = 60 + 90 = 150 km.
  2. (b) Total time = 1.5 + 1.5 = 3 h.
  3. (c) Average speed = 150/3 = 50 km/h.
Q28. (a) 1500 m (b) 170 m (c) 2 Hz, 0.5 s
  1. (a) The signal travels down and back: 1500 × 2 = 3000 m, so depth = 1500 m.
  2. (b) Total path = 340 × 1 = 340 m, so wall distance = 170 m.
  3. (c) Frequency = 20/10 = 2 Hz; time period = 1/2 = 0.5 s.
Q29. (a) 2Mg + O₂ → 2MgO (b) combination (c) 80 g
  1. (a) 2Mg + O₂ → 2MgO.
  2. (b) Two substances combine to form one, so it is a combination reaction.
  3. (c) 2 × 24 = 48 g Mg reacts with 32 g O₂ to give 2 × 40 = 80 g MgO. So 48 g Mg gives 80 g of magnesium oxide.
Q30. (a) fish, amphibians, reptiles, birds, mammals (b) birds and mammals
  1. (a) Fish, amphibians, reptiles, birds and mammals.
  2. (b) Birds and mammals are warm-blooded (maintain a constant body temperature).
  3. (c) Examples: rohu (fish), frog (amphibian), lizard (reptile), crow (bird), cow (mammal).
← All ICSE Class 7 Exams